How would you explain the average density of an asteroid being about 2 g/cm3, if the density of rock is usually around 3 g/cm3?
A. The asteroid is made of fragments only loosely held together by gravity.
B. The asteroid contains an unusually large quantity of helium.
C. The asteroid is of the stony type, not the iron type.
D. The asteroid contains significant quantities of icy compounds.
Answer: A
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